Name any two diseases each caused by bacteria in plants and animals.

The two diseases caused by bacteria in plants are:

• Black rot of mustard – It is caused by Xanthomonas campestris and leads to yellow to brown patches on leaves.
  
• Blight of cowpea – It is caused by Xanthomonas axonopodis and forms water-soaked patches on the underside of leaves.

The two diseases caused by bacteria in animals are:

• Anthrax – It is caused by Bacillus anthracis and symptoms include skin ulcer with dark scab.
  
• Tuberculosis – It is caused by Mycobacterium tuberculosis that affects the lungs and builds up cough along with mucus.